Home / 28,540.10-39,422.99-21,907.68

Finding the Fourth Proportional to 28,540.10, 39,422.99 and 21,907.68

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Solution

The fourth proportional to 28,540.10, 39,422.99 and 21,907.68 is: 30,261.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,540.10 : 39,422.99 = 21,907.68 : x
  2. Step 2: Convert to fraction form
    28,540.10/39,422.99 = 21,907.68/x
  3. Step 3: Cross multiply
    28,540.10x = 39,422.99 × 21,907.68
  4. Step 4: Simplify right side
    28,540.10x = 863,666,140.02
  5. Step 5: Solve for x
    x = 863,666,140.02/28,540.10
  6. Step 6: Final answer
    x = 30,261.50

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.